x/playground: Unit tests not working with multiple files #68327
Description
Go version
go version go1.22.4 darwin/arm64
Output of go env in your module/workspace:
GO111MODULE=''
GOARCH='arm64'
GOBIN=''
GOCACHE='/Users/x1unix/Library/Caches/go-build'
GOENV='/Users/x1unix/Library/Application Support/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='arm64'
GOHOSTOS='darwin'
GOINSECURE=''
GOMODCACHE='/Users/x1unix/go/pkg/mod'
GONOSUMDB='off'
GOOS='darwin'
GOPATH='/Users/x1unix/go'
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/opt/homebrew/Cellar/go/1.22.4/libexec'
GOSUMDB='off'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/opt/homebrew/Cellar/go/1.22.4/libexec/pkg/tool/darwin_arm64'
GOVCS=''
GOVERSION='go1.22.4'
GCCGO='gccgo'
AR='ar'
CC='cc'
CXX='c++'
CGO_ENABLED='1'
GOMOD='/Users/x1unix/prj/go-playground/go.mod'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -ffile-prefix-map=/var/folders/7q/wj_9b_vd5699c2ldbt4_z5wm0000gn/T/go-build1040282864=/tmp/go-build -gno-record-gcc-switches -fno-common'What did you do?
I opened the Go Playground and tried to write a simple unit test that imports a sub-package.
Go playground claims to support unit tests execution and provides unit test snippet example.
Snippet: https://go.dev/play/p/eSN-TbF14vE
What did you see happen?
Playground can't play unit tests when:
- Snippet contains multiple files - https://go.dev/play/p/IwQvNE92IYc
- Snippet has a file name directive (e.g.
-- foo/foo.go --) - https://go.dev/play/p/rWt55VNAawd
If snippet contains file name directive, Playground returns error:
play.ground: no non-test Go files in /tmp/sandbox1158510457
Go build failed.
What did you expect to see?
Expected to have a working unit test runner.
Probably issue is caused by a buggy unit test file detector.